Reducing agent and method of producing same.



nnnucnva AGENT mam az'z whom it may concern: known that I, CrIAB Es I S.BRADLEY, oithell edr t s n a e d n ducing Agents and 1 Methods ofProducing Same, o ole specification; invention relates, to metallurgicalre proyedi reducingagent and the method of piroducingthe same.

gQne-of the objects of my invention is to rovide an effective reducingagent, morees values. 7 For illustration, however,.I shall flrefer toits; usein reducing high valency compounds of ore values in solution.For the sake of economy it is usually preferable to employ, as far aspossible, in ore concentrating" methods, which are present in the ore orare associated therewith. Limestone, for example, is plentiful andfrequently found in the neighborhood of ore. concentrating opera- 40'tions, and hence is usually available at comaratively small expense.Again, pyrite is often present in the ore and hence is likewiseavailable. .i I am able to employ these two materials for 451ducingagent.

Burnt lime, or purchased outside is mixed with pyrite and heated to alow red heat. The two substances then react together, forming ferrousSpecifieatidnof Letterman.

, oroughof ,Manhattan, it city, county, 5 ndfita-teof New York, haveinvented cer; 1 ain new and useful Improvements inylige f which thefollowing is a full and Y ucti n and comprises in general-an.

pecially for metallurgical operations,wh1ch derstood as limited to itsuse in: connection with the chemlcal concentration of-iore the materialsI According to my invention the production of a cheap and efiective re:

either produced in the plant ri-ron for rnonncme smvini sulfichcalciumand. calcium sulfate,

' with calcium sulfate heed not 'be subj ected toany further treatmentfor separating the constituent parts, but according to my iny y l p toPatentedJan; 15, 1918. N llrgwingqnpplicaticn fileli'llfiarch lfi,191.8}Seria1 No. Renewed June f, 191?. "Serial No.'173,41 8.

r mm' S 3 A LEY new YQRKLN ventlon the mixture is employed-as the re-Uducing agent While the calcium sulfate is not of any effect as areducing agent, still its presence in the unixture is not ofconsequence, and if lesired, it ay for examp'le,

beremoved fromhsolutions. in which the mixture has been employed toreduce :var iae WAssum ngan example of the inventiomin which a solutionof cnpriclchlorid in calcupricchlorid solution which is preferably hlegvalency compounds, prior to the product onsof prec pitates of the Theferrous sulfid and calcium sulfid immediately react strongly with thecupric chlorid, in accordance with the following lution and calciumsulfate:

CuC1 +CuS= Cu Cl +S Therefore any copper sulfid which was

